Plait-folder for sewing-machines.



A. H. DE VOE. PLAIT FOLDER FOR SEWING MACHINES.

APPLICATION FILED MAR. 6. I914.

Patented Apr. 13,

I I/I T/VESSES:

06% $40 w WM ALBERT H. DE 'VOE, OF WESTFIELD, NEW JERSEY, ASSIGNOR TOTHE SINGER MANUFACTURING COMPANY, A CORPORATION OF NEW JERSEY.

PLAIT-FOLDER FOR Specification of To all whom it may concern:

Be it known that 1, ALBERT H. DE Von, a citizen of the United States,residing at VVestfield, in the county of Union and State of New Jersey,have invented certain new and useful Improvements in Plait-Folders forSewing-Machines, of which the following is a specification, referencebeing had therein to the accompanying drawings.

This invention relates to improvements in plait folders for sewingmachines and has for its object to improve the device for like purposerepresented by my U. S. patent application, Serial No. 759,826, filedApril 9, 1913 and to this end I have provided independently controlledlevers for giving to the folding and guiding fingers adjustments foreffecting varying widths of plaits, and have simplified and strengthenedthe parts to better meet the requirements incident to machines speciallyfitted for effecting a given operation at comparatively high speed inconnection with factory products.

In the accompanying drawings, which form a part of the specification,Figure 1 is a view in perspective of the improved folding attachment,together with so much of the bed-plate and the stitch-forming andcloth-feeding mechanism of the sewing machine as is deemed essential fora proper understanding of the invention. Fig. 2 an under side view ofthe folding fingers and elements for effecting their adjustments,

detached from the attachment base-plate. Fig. 3 an edge view of Fig. 2,together with a like view of the attachment base-plate.

Referring to the figures, Fig. 1 represents the bed-plate of the sewingmachine, 2 and 3 the front and back slide plates respectively, 4 thethroat-plate,5 the cloth-presser, 6 the cloth-presser bar, 7 theneedle-bar with its attached needles, as 8, 9 the feed-dog and 10 aportion of the head of one form of commonly employed overhangingbracket-arm.

11 represents a bracket secured to the head 10 by suitable screws, as12, (one only of which is shown) the lower arm 13 of said bracket beingprovided with adjustably secured plates, as 14, to the outer edges ofwhich are secured by suitable screws, as 15, complemental folding blades16 and 17, the screw 18 acting to secure said plates in givenadjustments.

19 denotes a folding guide provided with an arm 20 adjustably secured inthe bracket SEWING-MACHINES.

Letters Patent Patented r lrpir 13, 1915..

Serial No. 822,815.

11 by screw 21 and 22 the attachment baseplate.

23 represents a rib formed integral with and at the under side of theattachment baseplate and terminating at its opposite ends in bearings 24and 25; and intermediate of said bearings is formed a depending lug 26into which is suitably secured a stud-bearing 27 on which is mounted thefolding and guiding finger adjusting levers 28 and 29.

3O denotes a left hand and 31 a right hand folding and guiding finger,each consisting of integrally formed superposed plies suit ably rivetedto inlying end sections, as 32, thus forming the pockets orcomparatively deep grooves, as 33, (one only of which is shown, seeFig. 1) the under ply of each of said fingers being provided with slots,as 34, and reduced end portions, as 35.

Into the bearing 24 is secured by screw 36 a bushing 37, and into thebearing 25 is secured by screw 38 a bushing 39, and into the latter isjournaled a hollow shaft 40, and into the bushing 37 a hollow shaft 41,and into the latter is journaled a shaft 42, and into the hollow shaft40 a shaft 43, the upper end of the latter being rigidly secured to thefinger adjusting blade 44 carry ing the screw 45 tracking one of theslots, as 34, of the guiding finger 31, the upper end of the shaft 42being rigidly secured tothe finger adjusting blade 46 carrying the screw47 which tracks the other of the slots 34 of the guide-finger 31.

48 denotes a crank-arm rigidly secured to the lower end of the shaft 42and forked at its outer end to receive the pin 49 carried by theadjusting lever 29, the opposite end of the latter carrying a like stud50 which is embraced by the forked end of the crankarm 51 rigidlysecured to the lower end of the shaft 43.

52 denotes an index blade secured to the adjusting lever 29 by screw 53and provided with a pinch screw 54 which, when it is des red to securethe adjusting lever 29 in a given ad ustment, is caused to pinch theoppositely arranged surfaces of the index blade against the oppositelyarranged surfaces of the attachment base-plate, the in deX 55 indicatingthe difi'erent widths of plaits.

The forward end of the folding and guiding finger 30 is operativelyconnected with the adjusting lever 28 through the screw 55,

finger adjusting blade 56 rigidly secured to the hollow shaft 40, thelatter carrying at its lower end the rigidly secured crank-arm 57 forkedto secure the stud 58 carried by said adjusting lever 28, the oppositeend. of said folding and guiding finger being operatively connected withsaid adjusting lever by screw 59, finger adjusting blade 60, hollowshaft 41, the latter carrying at its lower endthe rigidly securedcrank-arm 61 forked to receive the stud 62 carried by said adjustinglever. The adjusting lever 28 is pro vided with an index blade 63 oflike construction and for a like purpose as the index blade 52 securedto the adjusting lever 29.

64 and 65 are complemental swinging arms, each being pivoted at one endupon a stud 66 secured in the attachment base-plate '22, their oppositeends being pivotally attached by screws 67 and 68 to the respectiveguiding fingers 30 and 31 whereby said fingers are held against movementin the direction of their length. The finger adjusting blades 60 and 46are preferably slightly longer than the like blades 56 and 44 thuseffecting adjustments of the fingers 30 and 31 at a slight angle to theline of scam formation.

From the foregoing it is to be Lmderstood that the adjustment of thefolding and guiding finger 30 is effected through the manipulation ofthe adjusting lever 28 and that the adjustment of the folding andguiding finger 31 is effected through the manipulation of the adjustinglever 29.

Having thus set forth the nature of the invention, what I claim hereinis 1. In a boX-plait folder for sewing machines, an attachmentbase-plate, complemental folding and guiding fingers mounted thereon,and a bracket provided with oppositely arranged folding blades suspendedabove the bed-plate of the sewing machine, of independently mountedadjusting levers located below said base-plate and operatively connectedwith said folding and guiding fingers to effect the adjustments of thelatter for varying widths of plaits.

2. In a box-plait folder for sewing machines, an attachment base-plate,complemental folding and guiding fingers mounted thereon, and a bracketprovided with oppositely arranged folding blades suspended above thebed-plate of the sewing machine, of adjusting levers pivotally mountedon a stud-bearing depending from said base-plate and operativelyconnected through forked connections with said folding and guidingfingers to effect adjustments of the latter for varying widths ofplaits.

3. In a boX-plait folder for sewing machines, an attachment base-plate,complemental folding and guiding fingers mounted thereon, and a bracketprovided with oppositely arranged folding blades suspended above thebed-plate of the sewing machine,

of independently mounted adjusting levers located below said base-plateand provided with index blades overlying the upper surface of saidattachment base-plate and operatively connected with said folding andguiding fingers to effect adjustments of the latter for varying widthsof plaits.

4. In a boX-plait folder for sewing machines, an attachment base-plate,complemental folding and guiding fingers comprising integrally formedsuperposed plies, and a bracket provided with oppositely arrangedfolding blades suspended above the bedplate of the sewing machine, ofindependently mounted adjusting levers located below said base-plate andoperatively connected with said folding and guiding fingers to effectthe adjustments of the latter for varying widths of plaits.

5. In a boX-plait folder for sewing machines, an attachment base-plate,complemental folding and guiding fingers mounted thereon, and a bracketprovided with oppositely arranged folding blades suspended above thebed-plate of the sewing machine, of independently mounted adjustinglevers located below said base-plate and operatively connected with saidfolding and guiding fingers to give the latter adjustments at one angleto each other and to the line of scam formation.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

ALBERT H. DE VOE. Witnesses:

GiiXA L. TERNA, LEONARD E. Freeman.

' Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, D. G. i

